Patent US2649291A successfully refreshed from Google Patents.
US2649291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detachable vane assembly for contact column
Assignee: Individual
•
Filing: 1951-10-17
•
Granted: 1953-08-18
•
Expires: 1971-10-17
Abstract
No abstract record available.
Inventors
- 👤 Bartolucci Ben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:20
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |